2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 133Get this manual
CHECKING THE FUSES ADJUSTING THE HEADLIGHT BEAM Items Main Reserve WARNING
Amperage rating 15 15 A
Never use fuse with an amperage rating other than that specifiedImprovising or using fuse with the wrong amperage rating may cause extensive damage to the electrical system, cause the lighting and ignition systems to malfunction and could possibly cause fireLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL